Amirhossein Nikzad | Shahrood University of Technology (original) (raw)

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Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

Sustainable Energy Technologies and Assessments, Feb 1, 2021

The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water p... more The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m 2 , the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

Research paper thumbnail of Technical, economic, and environmental modeling of solar water pump for irrigation of rice in Mazandaran province in Iran: A case study

Journal of Cleaner Production, Dec 1, 2019

In this study, the required pumping power and number of PV modules for a photovoltaic water pumpi... more In this study, the required pumping power and number of PV modules for a photovoltaic water pumping system (PVWPS) were determined with the aim of supplying the water demand in a rice paddy located in north of Iran. Also, a battery bank was utilized as a backup system to increase system reliability in autonomy days. The idea of using PVWPS during non-irrigation months of the year in order to earn money through the sale of electricity generation from solar panels to the grid is one of the main objectives of this research which has not been considered in the previous works. Also, in this research, economic and environmental aspects about PVWPS have been performed and the system performance has been compared with conventional diesel pumping systems (CPS). The results show that although the initial cost of PVWPS in off-grid mode is 2.14 times of the CPS initial cost, its operating and maintenance costs and total life cycle cost (LCC) are respectively 8.7 times and 29.9% lower than that of costs of CPS. Also, the initial cost of PVWPS in the on-grid mode is slightly more than about 2.41 times of the cost of the initial CPS, but its O & M and LCC costs are 7.25 times and 16% lower than those for CPS, while in the case of selling electricity to the grid, it could generate income of $ 8212 in project lifetime, which is equivalent to 59.9% of LCC of the system and results in reducing the costs by 189.2% compared with the final cost of the CPS. Additionally, from environmental viewpoint, the results showed that CO 2 production for off-grid PVWPS during the lifetime of the project is 190e201 times lower than that for the CPS and compared with the supply of power to the motor pump from the grid, CO 2 emissions reduced 16.96 times. Also, by replacing the CPS with PVWPS during irrigation period, it can save about 1820e1722 L of diesel fuel and 85 L of engine oil. Additionally, in on-grid operation, the PVWPS leads to about 71% reduction in noise production than CPS.

Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

Sustainable Energy Technologies and Assessments

Abstract The main purpose of this study is the analysis of the exergy efficiency of a photovoltai... more Abstract The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m2, the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

ELSEVIER, Solar Energy, 2022

Today, earning money through cryptocurrency mining, especially in developing countries such as Ir... more Today, earning money through cryptocurrency mining, especially in developing countries such as Iran, is rapidly expanding due to the low value of the national currency in comparison with the world's major currencies. But illegal mining, high power consumption of the mining system, and the resulting environmental consequences are among the challenges facing this industry in Iran. Therefore, in this study to solve these problems, the simultaneous generation of electricity and mining of Ethereum cryptocurrency with a legal approach through power supply of the system by a 5.2 kWp grid-connected photovoltaic (PV) rooftop system as well as its technical, economic, and environmental analysis are considered. The results show that the proposed PV rooftop system can supply 83% of the consumed AC electricity of the mining system per year and prevent the annual emissions of 5.5 tCO2 to the atmosphere simultaneously. Also, the desirability of the payback period and the ratio of benefit to cost, positive net present value (NPV) index as well as attractive internal rate of return (IRR) index, all show the usefulness of the project. Finally, the cumulative cash flow value of this project at the end of its lifespan will be $ 478038, which is a significant amount.

Research paper thumbnail of Technical, economic, and environmental modeling of solar water pump for irrigation of rice in Mazandaran province in Iran: A case study

ELSEVIER, ScienceDirect, 2019

In this study, the required pumping power and number of PV modules for a photovoltaic water pumpi... more In this study, the required pumping power and number of PV modules for a photovoltaic water pumping system (PVWPS) were determined with the aim of supplying the water demand in a rice paddy located in north of Iran. Also, a battery bank was utilized as a backup system to increase system reliability in autonomy days. The idea of using PVWPS during non-irrigation months of the year in order to earn money through the sale of electricity generation from solar panels to the grid is one of the main objectives of this research which has not been considered in the previous works. Also, in this research, economic and environmental aspects about PVWPS have been performed and the system performance has been compared with conventional diesel pumping systems (CPS). The results show that although the initial cost of PVWPS in off-grid mode is 2.14 times of the CPS initial cost, its operating and maintenance costs and total life cycle cost (LCC) are respectively 8.7 times and 29.9% lower than that of costs of CPS. Also, the initial cost of PVWPS in the on-grid mode is slightly more than about 2.41 times of the cost of the initial CPS, but its O & M and LCC costs are 7.25 times and 16% lower than those for CPS, while in the case of selling electricity to the grid, it could generate income of $ 8212 in project lifetime, which is equivalent to 59.9% of LCC of the system and results in reducing the costs by 189.2% compared with the final cost of the CPS. Additionally, from environmental viewpoint, the results showed that CO2 production for off-grid PVWPS during the lifetime of the project is 190–201 times lower than that for the CPS and compared with the supply of power to the motor pump from the grid, CO2 emissions reduced 16.96 times. Also, by replacing the CPS with PVWPS during irrigation period, it can save about 1820–1722 L of diesel fuel and 85 L of engine oil. Additionally, in on-grid operation, the PVWPS leads to about 71% reduction in noise production than CPS.

Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

ELSEVIER, ScienceDirect, Nov 2020

The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water p... more The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m2, the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.

Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

Sustainable Energy Technologies and Assessments, Feb 1, 2021

The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water p... more The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m 2 , the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

Research paper thumbnail of Technical, economic, and environmental modeling of solar water pump for irrigation of rice in Mazandaran province in Iran: A case study

Journal of Cleaner Production, Dec 1, 2019

In this study, the required pumping power and number of PV modules for a photovoltaic water pumpi... more In this study, the required pumping power and number of PV modules for a photovoltaic water pumping system (PVWPS) were determined with the aim of supplying the water demand in a rice paddy located in north of Iran. Also, a battery bank was utilized as a backup system to increase system reliability in autonomy days. The idea of using PVWPS during non-irrigation months of the year in order to earn money through the sale of electricity generation from solar panels to the grid is one of the main objectives of this research which has not been considered in the previous works. Also, in this research, economic and environmental aspects about PVWPS have been performed and the system performance has been compared with conventional diesel pumping systems (CPS). The results show that although the initial cost of PVWPS in off-grid mode is 2.14 times of the CPS initial cost, its operating and maintenance costs and total life cycle cost (LCC) are respectively 8.7 times and 29.9% lower than that of costs of CPS. Also, the initial cost of PVWPS in the on-grid mode is slightly more than about 2.41 times of the cost of the initial CPS, but its O & M and LCC costs are 7.25 times and 16% lower than those for CPS, while in the case of selling electricity to the grid, it could generate income of $ 8212 in project lifetime, which is equivalent to 59.9% of LCC of the system and results in reducing the costs by 189.2% compared with the final cost of the CPS. Additionally, from environmental viewpoint, the results showed that CO 2 production for off-grid PVWPS during the lifetime of the project is 190e201 times lower than that for the CPS and compared with the supply of power to the motor pump from the grid, CO 2 emissions reduced 16.96 times. Also, by replacing the CPS with PVWPS during irrigation period, it can save about 1820e1722 L of diesel fuel and 85 L of engine oil. Additionally, in on-grid operation, the PVWPS leads to about 71% reduction in noise production than CPS.

Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

Sustainable Energy Technologies and Assessments

Abstract The main purpose of this study is the analysis of the exergy efficiency of a photovoltai... more Abstract The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m2, the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

Research paper thumbnail of Techno-economic, and environmental evaluations of a novel cogeneration system based on solar energy and cryptocurrency mining

ELSEVIER, Solar Energy, 2022

Today, earning money through cryptocurrency mining, especially in developing countries such as Ir... more Today, earning money through cryptocurrency mining, especially in developing countries such as Iran, is rapidly expanding due to the low value of the national currency in comparison with the world's major currencies. But illegal mining, high power consumption of the mining system, and the resulting environmental consequences are among the challenges facing this industry in Iran. Therefore, in this study to solve these problems, the simultaneous generation of electricity and mining of Ethereum cryptocurrency with a legal approach through power supply of the system by a 5.2 kWp grid-connected photovoltaic (PV) rooftop system as well as its technical, economic, and environmental analysis are considered. The results show that the proposed PV rooftop system can supply 83% of the consumed AC electricity of the mining system per year and prevent the annual emissions of 5.5 tCO2 to the atmosphere simultaneously. Also, the desirability of the payback period and the ratio of benefit to cost, positive net present value (NPV) index as well as attractive internal rate of return (IRR) index, all show the usefulness of the project. Finally, the cumulative cash flow value of this project at the end of its lifespan will be $ 478038, which is a significant amount.

Research paper thumbnail of Technical, economic, and environmental modeling of solar water pump for irrigation of rice in Mazandaran province in Iran: A case study

ELSEVIER, ScienceDirect, 2019

In this study, the required pumping power and number of PV modules for a photovoltaic water pumpi... more In this study, the required pumping power and number of PV modules for a photovoltaic water pumping system (PVWPS) were determined with the aim of supplying the water demand in a rice paddy located in north of Iran. Also, a battery bank was utilized as a backup system to increase system reliability in autonomy days. The idea of using PVWPS during non-irrigation months of the year in order to earn money through the sale of electricity generation from solar panels to the grid is one of the main objectives of this research which has not been considered in the previous works. Also, in this research, economic and environmental aspects about PVWPS have been performed and the system performance has been compared with conventional diesel pumping systems (CPS). The results show that although the initial cost of PVWPS in off-grid mode is 2.14 times of the CPS initial cost, its operating and maintenance costs and total life cycle cost (LCC) are respectively 8.7 times and 29.9% lower than that of costs of CPS. Also, the initial cost of PVWPS in the on-grid mode is slightly more than about 2.41 times of the cost of the initial CPS, but its O & M and LCC costs are 7.25 times and 16% lower than those for CPS, while in the case of selling electricity to the grid, it could generate income of $ 8212 in project lifetime, which is equivalent to 59.9% of LCC of the system and results in reducing the costs by 189.2% compared with the final cost of the CPS. Additionally, from environmental viewpoint, the results showed that CO2 production for off-grid PVWPS during the lifetime of the project is 190–201 times lower than that for the CPS and compared with the supply of power to the motor pump from the grid, CO2 emissions reduced 16.96 times. Also, by replacing the CPS with PVWPS during irrigation period, it can save about 1820–1722 L of diesel fuel and 85 L of engine oil. Additionally, in on-grid operation, the PVWPS leads to about 71% reduction in noise production than CPS.

Research paper thumbnail of Exergy, environmental, and performance evaluations of a solar water pump system

ELSEVIER, ScienceDirect, Nov 2020

The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water p... more The main purpose of this study is the analysis of the exergy efficiency of a photovoltaic water pump system (PVWPS) at different temperatures and radiations that have not been presented in the previous works. For estimation of the exergy efficiency, at first, the optimal design and sizing of the system have been estimated using a specialized software to meet the water demand of potato crop in Isfahan City, Iran. Then, some performance parameters of the system, such as pump flow rate, exergy efficiency as well as some environmental aspects including decrease of environmental pollutants have been evaluated at different months. The results showed that the highest and lowest exergy efficiencies of the proposed PVWPS are 3.56 and 0.27%, respectively. Also, at irradiation values above 900 W/m2, the impact of ambient temperature on the pump power and outlet discharge is not considerable. In addition, using the proposed system with renewable source, leads to decrease of about 4.8 tonnes of carbon dioxide emissions into the atmosphere each year.